【1.Thisis___difficultproblemthatfewstudantscanworkitout.A.soB.soaC.suchD.sucha2.___themoviestargoes,therearecrowdsoffanswaitingtoseeher.A.WhenB.HoweverC.WhereD.Wherever3.Theywereallsotiredthattheycould____.A.don】

　　1.Thisis___difficultproblemthatfewstudantscanworkitout.

　　A.soB.soaC.suchD.sucha

　　2.___themoviestargoes,therearecrowdsoffanswaitingtoseeher.

　　A.WhenB.HoweverC.WhereD.Wherever

　　3.Theywereallsotiredthattheycould____.

　　A.donothingbutsleepB.doanythingbutsleep

　　C.donothingbuttosleepD.doanythingbuttosleep

　　4.Idon'thavetointroducehimtoyou____allofyouknowhim.

　　A.untilB.unlessC.sinceD.but